systemd

I am sort of new to Linux and Ubuntu. I found a tutorial on upstart and
managed to get seti to start at boot. Now with systemd I need to start over
and learn a new program.
I searched for a systemd tutorial but could not find one. Anyone have a URL?
I have read the "Systemd for Upstart Users" but I need more information.
Does anyone have the susyemd files needed to start seti?
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Robert Blair